(fix) reacitve declare destructuring with alias

packages/svelte2tsx/src/svelte2tsx/utils/tsAst.ts

@@ -87,6 +87,9 @@ export function extractIdentifiers(
             } else if (ts.isShorthandPropertyAssignment(child)) {
                 // in ts Ast { a = 1 } and { a } are both ShorthandPropertyAssignment
                 extractIdentifiers(child.name, identifiers);
+            } else if (ts.isPropertyAssignment(child)) {
+                // { a: b }
+                extractIdentifiers(child.initializer, identifiers);
             }
         });
     } else if (ts.isArrayLiteralExpression(node)) {

packages/svelte2tsx/test/svelte2tsx/samples/reactive-declare-destructuring/expected.tsx

@@ -0,0 +1,13 @@
+///<reference types="svelte" />
+<></>;function render() {
+
+let  { a } = __sveltets_1_invalidate(() => ({ a: '' }));
+let  { b: d } = __sveltets_1_invalidate(() => ({ b: '' }));
+let  { c: { length } } = __sveltets_1_invalidate(() => ({ c: '' }));
+let  { ...e } = __sveltets_1_invalidate(() => ({ f: ''}));
+;
+() => (<></>);
+return { props: {}, slots: {}, getters: {}, events: {} }}
+
+export default class Input__SvelteComponent_ extends __sveltets_1_createSvelte2TsxComponent(__sveltets_1_partial(__sveltets_1_with_any_event(render()))) {
+}

packages/svelte2tsx/test/svelte2tsx/samples/reactive-declare-destructuring/input.svelte

@@ -0,0 +1,6 @@
+<script>
+$: ({ a } = { a: '' });
+$: ({ b: d } = { b: '' });
+$: ({ c: { length } } = { c: '' });
+$: ({ ...e } = { f: ''});
+</script>